SteamyTea

Does the name Peter Rachman ring a bell?

Are you going to put a temperature/RH logger on it, maybe one of my cheap energy meters as well. Should cost about 40 quids all in. Airflow would be a bit harder to do, something I keep meaning to look at.

Have a look at blown in cellulose insulation.

I think Building Control will need to see the electrical certificate before sign off. Regarding electrical usage. It is quite easy to not be drawing any electric power. Parasitic loads are storage killers. MVHR and sewage treatment pumps are a bit of a problem, but they don't have to re run 24/7. It really is a matter of sizing correctly and accepting that sometimes you just have to turn things off, or not have them working all the time. Cooking is an interesting one. It is not compulsory to use every job, and have an oven on for 2 hours every day. If you are low on battery storage, boil some pasta or rice, heat a jar of sauce up, supper sorted.

Just match it hour for hour. I was filmed for an educational video about massage once. Was oiled up and stroked for 8 hours. Fantastic it was.

Behind his slide rule maybe.

I have not calculated it, was just an idea when I saw two Transit Van radiators against a wall at the garage that MOTed my car. Why we need is a pikey that owns a scrapyard as a member then they can get us all sorts of bits to try out.

Here is a picture of the Monodraught parts I prototyped in the 1990s. They are only circular to match the pipe, and only domed as that is what they wanted. Prototype vacuum forming is relatively cheap to do as the former can be timber.

No. It is partly why I stalled on the DIY solution. I do have an idea about using large car radiators connected in a thermosyphon configuration. They come with fans that can be easily controlled, have a very large transfer area, are already rectangular, so easy to box in, can fit though a loft hatch.

Book me in.

Yes, but more efficiency design helps a lot.

This is an opportunity. A/C units and PV together. Roof, and maybe wall mounted PV can also help reduce building overheating. It is discussed a lot. Down here the local authority has a map of coastal towns. There is a line on it and anything between the line and the sea will not be protected. There is a trial currently going on at Werrytown to monitor and protect (maybe). It was destroyed in 1962 by a storm. While it looks old (ish), most of the buildings are mid 60's onwards. There is a geological reason why you are not seeing changes. During the last ice age the UK was covered in ice down to Porth Nanven, this forced the land to go lower into the Earth's Crust. The land is now rebounding, but not evenly. Where I am is actually sinking at about 3mm a year, parts of NE Scotland is rising (due to no ice mass above it) at about 3mm a year. Sea levels are rising at about 3mm a year. So I see 5 to 6 mm rise every year, you see nothing. Over the last 20 years, that is, 60mm. Does not sound much, just over 2 inches, and is over shadowed by storm surges and large waves. The problem, as @JohnMo points out, is underground and in the estuaries. Here the overall chemistry of the ground water has become more saline, which affects the types of crops that can be grown (farmers pump groundwater from shallow boreholes ~10m deep. This is not a recent discovery, the Dutch already have plans to allow the Polders to be flooded, not by the sea, but by the Rhine. This preserves the fresh water supply. Again, I think this is an opportunity. Most of our low lying coast is protected and managed (think Norfolk Broads that are totally managed and have been for hundreds of years). Towns that were once connected to the sea, because of land drainage, are no longer connected. So by reducing the flood and drainage management over the next few decades, some of these old trading towns could become 'tidal' towns again, with the estuary being a feature. If the surrounding land is going to be unsuitable for agriculture, then put wind turbines and PV on the fields. The beauty of those technologies is that they are not necessarily permanent and can easily be moved (they are often on a 25 year planning restraint anyway). Water source heat pumps are also an opportunity. The sea is a lot warmer than a river in the winter.

You don't have to double the depth, a small increase can have a big effect. Okay about with a beam calculator to get a feel of what will happen.

I did some work on them for a company called Monodraught. I still have a couple of the mouldings kicking about. It is not necessary to have the reflective tubes, boxing and mirrors can work just as well. Think periscopes.

I don't want to derail this thread, so started another.

I was thinking, while driving home is very heavy rain, but with an outside air temperature, after dark, of nearly 15°C, about the opportunities that a changing climate may bring, and rather than despair about it, what we need to do to grasp these opportunities. Now it is over a decade since I studies climate change at university, but the underlying science and predictions have not changed any (one reason I gave up studying it). So rather than just think it will cost us all a lot of money, I think there are savings to be made i.e. less winter heating. Now these can always be countered with 'opposites' i.e. more cooling. But I am not so sure. 100 days of an average winter temperature 1 K above mean is going to save more than 10 days of summer temperatures 3 K above mean. I also think that extra rainfall, in a short period of time, can be mitigated and turned to our personal advantage. It may mean digging a few holes to add water storage to, but that is possibly cheaper than paying the water companies and local authorities to deal with the problem. So does anyone else have ideas how to turn variable weather to out advantage, then we can try and put some numbers behind it and see what is what.

As nice as some of the weather was, it is down to the definition of a heat wave. It is the number of days (3) above a threshold temperature. It also varies from place to place. So my heatwave is not the same temperature as your heatwave. https://www.metoffice.gov.uk/weather/learn-about/weather/types-of-weather/temperature/heatwave But not as much as winters will. I was thinking of starting a thread about climate change as the opportunities it may bring. Shall do it now.

0.0694 m3/s or 0.0556 kg/s At 30 W, that makes the efficiency 0.23%, I was miles out (and I got a 2 instead of a 3 for the volume). Yes, just do it as it is great fun. Mine did recover quite a bit of energy, but not the amount the fans used. But you can go looking for better fans and plumb them it later.

It gets into Moments of Inertia, which I always thought was a strange use of the English language for a static beam. The Moment is just a point in space, and the Inertia is just the ability to resist force, force is, in part, an acceleration. https://www.engineeringtoolbox.com/area-moment-inertia-d_1328.html Making a beam wider does not add much bending resistance, making it deeper does. If you were to structurally glue a 0.15m bit of timber under the runners, then attach that to the wall, that would make it much stronger and stiffer.

Generally speaking, the physically smaller a fan is, the less efficient it is. I used 2 Manrose remote bathroom fans on my DIY MVHR. I think they used more energy than they saved. Ideally you want large fans, running at a slow speed. Remember that 1 watt is the ability to move 1 kg, 1 meter, every second. Now a kg of air is 0.8 m2, a 1 W fan is not going to do that as the efficiency is probably around 5%.

I have always heard stress concentrators called stress raisers. I don't think this would qualify as a stress raiser as, apart from the extra force caused by the extra mass, there is no real difference. There may be a case where the dynamic loads are concentrated more towards the fixed ends, but in this case the lower overall deflection probably helps, not hinders, the situation.

I had to look it up, was some gruesome pictures. Then I found one that showed a plank overlapping a joint.

Welcome Check that as you may get reduced VAT. https://www.no-use-empty.org.uk/advice-and-guidance/property-tax-and-vat/reduced-vat-schemes/

Even with my water being the most expensive in the country, that is too high a price. What is this for?

Came across this idea a few days ago. I am sure if properly designed and maintained it would be clean enough. My only concern would be the cost, and long term availability of the filter. https://www.orbital-systems.com/ https://en.wikipedia.org/wiki/Water_recycling_shower Anyone have any experience if them?